Shopping trolley sketch

Been looking everywhere for this sketch I once saw on an Australian comedy show, thinking it may have been Fast Forward (possibly Full Frontal or Comedy Company) where shopping trolleys/carts are escaping from local shopping centres and living in herds like cows in paddocks and on the streets. Goddam hilarious, but can't find it on Youtube. Can any fellow Aussies help with this?? What show or season it may have appeared in? Cheers